Electric fan



Nov. 16, 1937. CHAPMAN I 2,099,196

, ELECTRIC FAN Filed Sept. 2, 1936 TTORNEYS.

Patented Nov. 16, 1937 UNITED STATES PATENT OFFICE 1 Claim;

My invention relates to electric fansand more I especiallyto fans of the character adapted to throw air simultaneously in all directions on a horizontal plane.

A further purpose of my invention is to provide in an electric fan a rotatable fan blade structure wherein the shape and operating position of the blade when rotating in a horizontal plane, would pull air into the fan down from the top, up from the bottom and thrust the air outwardly in all directions from the middle in a horizontal plane.

A particular purpose of my invention is to provide in an electric fan adapted to rotate in a horizontal plane, a fan blade structure which may be placed, for instance, in the center of a dining table or library table, and when in operation, adapted to provide a cool breeze in the faces of those who may sit about the table. 7

I attain the objects of my invention by the device described in the annexed specification, recited in the claims and illustrated in the accompanying drawing wherein like reference numerals indicate like parts in the several figures.

Referring to the figures: V

Fig. 1 is a top view ofmy invention.

Fig. 2 is a side elevation of my electric fan.

Fig. 3 is a perspective of the fan blade structure alone.

Fig. 4 is an illustration of a variation in the form of the intermediate blade members of my fan.

Fig. 5 is a diagrammatic sketch illustrating the relative operating relation of the top, the bottom I and the intermediate fan blade members. Referring now to the details of the preferred mechanical construction and arrangement of my disposed and set to an angle which when rotat' novel electric fan, I provide with a motor member I having an upright shaft 2 adapted to rotate in a horizontal plane, a fan blade structure 3 detachably secured to said shaft 2.

This fan blade structure has a generally spherical form about its outline and is shaped to define an upper set of blades 4 which are radially 1 blades 1 in Fig. 4.

ing will suckair downwardly into the fan; while at the same time, a spaced and lower set of blades 5 are radially disposed and set in an angular position which vwhen rotating will pull air upwardly into the fan from below. In conjunction with the upper and lower sets of bladesin this fan structure I provide as one of the novel features in my invention a set of intermediate blades 6 which arcuately extend from the upper blade position to the lower blade position about shaft 2 and are shaped in a manner adapted to give the air an outward thrust in a horizontal plane in every direction about upright shaft 2 when the fan structure is rotating.

It is obvious that other forms of intermediate blades than those shown could be effectively used and covered by thescope of my claim and I have illustrated one of those forms as intermediate establishing a fixed connection adjacent the top a and bottom of said shaft; said fan comprising a plurality of radially spaced blades, each curved arcuately with respect to the shaft and irregularly with respect to the plane in which the arc of the blade lies, a curved blade set for movement with each of said blades and fixed at the top of each blade and disposed in position to pull air downwardly from'the top of the blade, a second curved blade fixed at the bottom of each of said fan blades for rotation therewith and disposed in position to pull air upwardly thereby.

JOHN E. CHAPMAN.

well be used on a dining 

